<template>
    <div class="tabs">
        <el-tag
            v-for="(item, index) in tags"
            :key="item.path"
            :closable="item.name !== 'home'"
            :effect="$route.name === item.name ? 'dark' : 'plain'"
            @click="changeMenu(item)"
            @close="handleClose(item, index)"
            size="small"
        >
            {{ item.label }}
        </el-tag>
    </div>
</template>

<script>
import { mapState, mapMutations } from 'vuex'
export default {
    name: 'CommonTag',
    data() {
        return {}
    },
    computed: {
        ...mapState({
            tags: state => state.tab.tabsList
        })
    },
    methods: {
        ...mapMutations(['closeTag']),
        // 点击 tag 跳转的功能
        changeMenu(item) {
            // 容错逻辑
            if(this.$route.path !== item.path && !(this.$route.path === '/home' && (item.path === '/'))){
                this.$router.push({ name: item.name })
            }
        },
        // 点击 tag 删除的功能
        handleClose(item, index) {
            // 调用 store 中的 mutations
            this.closeTag(item)
            const length = this.tags.length
            // 删除后的跳转逻辑
            if (item.name !== this.$route.name) {
                return
            }
            if(index === length) {
                this.$router.push({
                    name: this.tags[index - 1].name
                })
            } else {
                this.$router.push({
                    name: this.tags[index].name
                })
            }
        }
    }
}
</script>
<style  lang="less" scoped>
.tabs {
    padding: 20px;
    .el-tag {
        margin-right: 15px;
        cursor: pointer;
    }
}
</style>